Glass shower door installation question?

A client of mine had a shower installed and bought a sliding glass door sepearate (one stationary glass door; one sliding). In the installation manual (Maxx halo) it shows some minimum requirements for the shower curb. One requirement is that the shower curb be 1 and 7/8” above the shower pan. Her shower pan is... show more A client of mine had a shower installed and bought a sliding glass door sepearate (one stationary glass door; one sliding).
In the installation manual (Maxx halo) it shows some minimum requirements for the shower curb. One requirement is that the shower curb be 1 and 7/8” above the shower pan. Her shower pan is only an inch high above the pan.
Do we need to return it? Doing so would be a hassle, and I just can’t imagine any reason why the curb height matters, after all the track rests on top of it.

Any insight would be helpful
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